Non-conductor compound car-roof



(No Model.)

P. H. MURPHY. NoN-CONDUCTOR coMPoUND GAR R001".

Patented Junev 20 vez Tm: cams r'zzns co. Fumo-Limo., WASHINGTON. n.1;

` UNrrnn STATES PATENT kErice..

PETER II. MURPHY, OF EAST AST. LOUIS, ILLINOIS.

NON-CONDUCTOR COMPOUND CAR-ROOF.

SPECIFICATION forming part of Letters Patent NO. 500,028, dated .T une 20, 1893.

Application filed January 6, 1893.- Seria1No.457.558. (No model.)

To all whom. it may concern.-

Be it known that I, PETER H. MURPHY, of East St. Louis, in the county of St. Clair and State of Illinois, have invented a certain new and useful Improvement in Non-Conductor Compound Car-Roofs, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, form-ing part of this specification.

This invention relates to a double car-roof, that has an intervening paper layer that maintains an unbroken stretch from end to end, unpierced by nail or bolt. An air-tight non-conductor is thus provided, and an intervening air chamber also ventilates said roof between its lower and upper sections; and the invention consists in features of novelty hereinafter fully described and pointed out in the claims. y

Figure I isa vertical, detail section, taken on line I-I, Fig. II, and shows the inside of the gable and its siding, the plates, the lower carlings, the lower sheeting, the duplex surmounting semi-circular carlings, the non-conductor paper layer between said latter carlings, the offset purlins at the eaves, the ridge pole, the intervening purlins and the upper matched sheeting. Fig. II is a detail, top view and shows the plates, the lower sheeting, the duplex semi-circular carlings, the non-conductor paper layer between said semi-circular carlings, the angle clips that hold said paper at the eaves, the offset purlin, the ridge pole, the intervening purlins, the upper sheeting and the foot platform. Fig. III is an enlarged, detail, vertical section,taken on line III-III, Fig. II, and shows the means of oifsetting the eaves purlin by its attachment to the projecting ends of the surmounting, duplex carlings, by means of which an escape passage is obtained for the drip when any occurs from the lower sheeting of the roof, and an inlet for the air is provided to the intervening air chamber. Fig. IV is an enlarged, detail, vertical section, taken on line IIT-IV, Fig. II, and shows the peak of the roof, andthe bolted connection of the timbers at said peak. Fig. Vis an enlarged, detail, vertical section, taken on line V-V, Fig. II, and shows the purlin, the lower sheeting, the duplex, surmounting semi-circular carlings, the non-conductor paper between said carlings, the purlin and the upper sheeting. Fig. VI is an enlarged, detail, vertical section, taken on line VI-VL Fig. II, and shows the eaves-board, the nonconductor paper, and one of the metal angle clips that hold the lower edge of said paper in place. Fig. VII is an enlarged, detail, vertical section, taken on line VII-VIL Fig. IV, and shows the duplex, semi-circular carlings, and their curve nip hold of the non-conductor paper. It also shows the lower Carling, the purlin, and the lower and upper roof sheeting; and Fig. VIII is an enlarged, detail, vertical section, taken on line VIII-VIII, Fig. IV, and shows a longer stretch of the various elements shown in Fig. VII minus the lower carling.

Referring to the drawingsz-l represents the plates of the roof that support the same at the summit of the sides 2 of the car,which plates reach from one gable end 3, to the other; 4 are the boards that inclose said sides and 5 the boards that inclose the ends.

6 are the gable crown boards, and 7 the eaves-boards.

8 represents the lower carlings, or rafters, the feet of which rest on said plates 1, and their tops peak against each other and carry the ridge of the roof at its apex. Longitudinally laid matched boards 9 rest and are secured on said carlings and constitute the lower roof sheeting l0.

11 represents the lower members of the dupleX semi-circular' super-carlings l2, the flat sides of which are secured on said lower roof, and on the apex of said carlings the layer of heavy paper 13 is laid. The said paper stretches from end to end of the car and coustitutes without a break, and without the perforation of either nails or bolts, except the two ridge bolts that pass through the projecting gable ends, out of vertical line with the interior of the car and thus is provided an effective non-conductor, to preserve the perishable lading of the car from the effects of frost, dac, The upper edges of the respective layers of paper from each side of the roof pass each other and constitute counterlaps 14. 15 represents the upper members of said duplex semicircular super-carlings, the round faces of which are placed downward, and rest on the non-conductor paper immediately surmount- IOO ing the apex or circular projecting face of the 4 lower member 11 of said duplex supeicarlings. It will thus be seen that the said mutually projecting, circular faces ofsaid supercarlings conjointly nip and hold said non-conductor paper, with a round grip that can neither cut nor injure the paper. The lower ends of said super-carlings project outward and beyond the eaves board 7, and constitute tenons 16 that are seated and secured in boxmortises 17, in the offset eaves purlins 18, and hold the same at a slight projection from 'said eaves board 7, so as to leaveafree space 19 between them for the drip from the lower eaves of any water that may have encroached there, and at the same time said aperture constitutes a free passage to andfrom the ventilator chamber 20, betweenthe two roofs.

21 represents the ridge pole that is secured along the peak of the roof by the screw bolts 22, that at each liush gable end are secured in the bolt holes 23 that pass through said ridge pole, and the underlying timbers previously stated, the heads of said bolts being depressed in the countersinks 24, and their screw tips secured by the washers 25 and screw nuts 26.

27 represents the intervening purlins that run longitudinally of the root and rest on the upper member '15 of the duplex carlings 12, and 2S is the match jointed upper sheeting of the roof, the match boards of which are secured to the ridge pole, the eaves purlins and the intervening purlins by the nails 29.

30 represents the foot-boards or elevated platforms that are secured on the sill-bedsl by nails 32 along the ridge ot' the roof of each car, and providea pathway for the brakemen, signalmen, &c., from end to end of the train.

33 represents angle-clips,- the perforate, lower angle plate of which is secured to the eaves-boards 7 by nails 34, and their upper,

imperforate plates clamp down on the lower edges of the non-conductor paper, and hold said paper at said points in close contact with the lower roof-sheeting at the eaves. It will be seen that as said paper is elevated by the lower member 1l of the duplex semi-circular carlings 12, on which carlings 11 said paper rests, therefore as said clips at their point of contact depress the lower edges of said sheets, there is at the eaves a series of curved depressions of said sheets, midway between said' carlin gs, that concentrate the moisture to central points ot' discharge.

this specilication; butit may be further stated( that the continuous layers of non-conductor paper that intervene between the lower and upper roof, being along the whole length that e surmounts the inside of the car, unpierced by either bolt or nail hole or any other perforation, the same makes a very eiiicient nonconductor of cold, heat, and dampness, and thus constitutes a valuable preservative against the injurious eects of said elements on the perishable contents of freight and stock cars. Also when the device is applied in the construction of passenger car roofs, it adds to the comfort of the occupants of the cars, keeping said car at amore even temperature and with a dryer atmosphere.

I claim-as my invention- 1. In a car-roof, the combination ot the lower roof 10, the duplex semi-circular carlings 12, and the intervening non-.conductor paper layer 13 between said carlings said duplex semi-circular carlings arranged to nip said paper layer without the intervention and piercing ot nails; substantially as described.

2. In a car roof, the combination of the plates 1, the lower carlings 8, the lower roof sheeting 10, the duplex semi-circular carlings 12, the non-conductor paper between said semi-circular carlings, and the angle-clips 33, that hold said paper at the eaves in an undulating position, without nails or other perforate means; substantially as described.

3. In a car roof, the combination of the platesl 1, the lower carlings 8, the lower roof sheeting l0, the duplex, semi-circular carlin gs 12the non-conductor paper 13 that is held between said semi-circular carlings, the offset eavesv purlins 18, secured to the projecting 'ends of said duplex carlings that provide afree ventilator space 19 between said purlins and the eaves, the ridge-pole 21, the bolts 22, the'intervening purlins 27, the angle clips 33, the upper roof sheeting 2S,4 and the foot platform 30; substantially as described.

BENJN. A. KNIGHT, E. S. KNIGHT.

IOO 

